Mitchell D1-112-5025 Tachometer is an aircraft engine instrument designed to provide accurate measurement and display of engine rotational speed in revolutions per minute (RPM). This precision instrument features a 3-1/8 inch diameter case design and is configured for clockwise (CW) operation with a calibration of 2566 RPM.

Designed for general aviation applications, the tachometer provides pilots and maintenance personnel with essential engine performance information by continuously monitoring propeller and engine speed. Accurate RPM indication is critical for proper engine operation, power management, cruise performance, and adherence to approved operating limitations.

The instrument is designed for installation in standard aircraft instrument panels and is suitable for use with compatible mechanical tachometer drive systems. Its reliable indication system allows pilots to monitor engine speed during all phases of flight, including start-up, climb, cruise, and landing operations.

During maintenance inspections, the tachometer should be checked for proper calibration, smooth pointer movement, display condition, secure mounting, and correct operation of the drive connection. Accurate tachometer performance supports safe engine operation and effective aircraft performance monitoring.

Key Features

- Part Number: D1-112-5025
- Manufacturer: Mitchell
- Component: Aircraft Tachometer
- Instrument Diameter: 3-1/8 inch panel mount configuration
- Rotation: Clockwise (CW)
- Calibration: 2566 RPM
- Provides accurate engine speed monitoring for pilot and maintenance reference
- Designed for general aviation aircraft instrument panel installations
- Supports aircraft engine performance monitoring and power management